Regular Expressions 101

Explanation
Pro

File:the literal text File: (case sensitive)

Group 1(.*?)

.*?any character (except for line terminators), repeated any number of times

Positive Lookahead(?=File:|<\/gallery>)

1st AlternativeFile:

File:the literal text File: (case sensitive)

2nd Alternative<\/gallery>

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

gallery>the literal text gallery> (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

File:(.*?)(?=File:|<\/gallery>)

New

<gallery>File:ReDescribe.jpg|Photo by:J. K.File:redescribe_still1.pngFile:redescribe_still2.jpegFile:redescribe_still3.jpgFile:redescribe_still4.jpgFile:redescribe_still5.jpg</gallery>

Substitution

<gallery>File:ReDescribe.jpg|Photo by:J. K.File:redescribe_still1.pngFile:redescribe_still2.jpegFile:redescribe_still3.jpgFile:redescribe_still4.jpgFile:redescribe_still5.jpg</gallery>